Spool or bobbin



(No Model.)

SPOOL 0R BOBBIN. No. 536,663

4:; viii/711:1

WITNESSES:

W. 0. STEVENSON.

i Patented Apr. 2, 1895.

. b INVENTOH:

Wm a%' VB A TTOHN E Y UNIT D STATES PATENT OFFICE.

WILLIAM C. STEVENSON, OF PITTSFIELD, MASSACHUSETTS.

SPOOL R BOBBIN.

SPECIFICATION forming part of Letters Patent No. 536,663, dated April. 2, 1895.

Application filed June 8, 1 892- Serial No. 435.956- (No model.)

T0 or whom it may concern.-

Be it known that I, WILLIAM G. STEVENSON,

' i a citizen of the United States, residing at Pittsfield, in the county of Berkshire and State of Massachusetts,have invented certain new and useful Improvements in Spools or Bobbins; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object the production of a spool or bobbin which shall be made by enameling so that no polishing is required,

thus effecting a great saving in the cost of production. Moreover the construction is such that they may be made in any number and kept in stock independently of the bearings, all the various sizes likely to be required being secured by providing bearings of suit able sizes to fit the various styles and sizes of spindles.

In order to accomplish the desired results and produce spools and bobbins adapted in every way to the requirements of the trade, I have devised the novel spool or bobbin which I will now describe, referring by numbers to the accompanying drawings, forming part of this specification, in which Figure l is an elevation of one .form in which I have carried my invention into effect; Fig. 2, a longitudinal section corresponding therewith; Fig. 3, an elevation of another form in which I have carried my invention into efieot; Fig. 4, a longitudinal section correspondin g therewith, and Fig. 5 is a longitudinal section illustrating still another form in which I have carried my invention into effect.

My novel spool or bobbin consists of four parts only, besides the bearings, viz: an inner tube denoted by 1, an outer tube denoted by 2, and two heads denoted by 3. In the form illustrated in Figs. 1 and 2 the heads are formed from disks of metal having a central opening 4 and a circular shoulder 5, approximately midway between the centralopening and the outer edge of the disk, the outer edges of both disks being curved over inward forming a. flange 6, the bobbin when not in use resting upon either of these flanges. The ends of the outer tube rest within the shoulders on the inner sides of the heads and are held closely in position thereby. The ends of the inner tube extend entirely through the central openings in the heads, being made sufficiently, long to permit the ends to be upset slightly as at 7, theupset or outward curving of the ends of the inner tube being the only means by which the parts are held together. It will thus be seen that I dispense with all material but metal and also dispense with rivets in securing the parts together, the upsetting of the ends of the inner tube being done with sufficient force to lock said tube and the outer tube rigidly to the heads, the outer tube serving as a brace and rendering it impossible for the parts to become loose in use.

In practice I finish the bobbin by enameling, the enamel filling the joints and rendering all polishing unnecessary.

8 denotes soft metal bearings the internal openings 9 of which are made to correspond in shape and size with the spindles upon which the spools or bobbins are to be used. For spinning bobbins the bearings are provided with tapering holes and for winding bobbins with straight holes. The bearings are secured within the inner tube by a drive fit or in any suitable manner.

It will be seen that the form illustrated in Figs. 1 and 2 gives the greatest possible carrying capacity, much greater so far as I am aware than that of any bobbin that has heretofore been produced.

In the form shown in Figs. 3 and 4: larger disks of metal are used to form the heads, the heads being considerably thicker and the bobbins when not in use resting upon a plate of metal instead of upon a flange as in the other form. For convenience in description I designate the inner plates of the heads as 3 and the outer plates as 3. Circular shoulders 5 are formed in the inner plate which is engaged by the outer tube in the same manner as in the other form. The outer plates are provided with central openings 10 which register with openings 4;. In this form the inner tube is upset or headed down upon the outer side of opening 4 the same as in the other form. The soft metal bearings, however, engage openings 10 in the heads as well as the ends of the inner tubes.

In the form illustrated in Fig. 5 the heads consist of inner and outer plates substantially the same as in the form last described. outer plate has a central opening at through which the inner tube extends and upon the outer side of which it is headed down. The ends of the outer tubein this form lie against the inner sides of plates 3 of the heads, plates 3 being provided with openings 11, through which said tube passes closely so that the parts are braced firmly in use. The soft metal bearings engage the inner tube the same as in the form first described.

Having thus described my invention, I claim 1. A spool or bobbin consisting of two sheet metal heads having shoulders upon their inner The sides and central openings, an outer tube the ends of which engage said shoulders, and an inner tube the ends of which pass through the central openings and are upset or headed down to lock the parts in place.

2. A spool or bobbin consisting of two heads having shoulders on their inner sides, and central openings, an outer tube engaging the shoulders and an inner tube passing through the central openings and upset upon the heads, the outer edges of the heads being curved over to form flanges 6 upon either of which the bobbin may rest when not in use.

3. The combination with a metal bobbin consisting of two heads having central openings, an outer tube, and an inner tube the ends of which pass through the openings and are upset upon the heads, of soft metal bearings which engage the ends of the inner tubes and are provided with central openings of suitable shape and size to engage the spindles upon which the bobbins are to be used.

In testimony whereof I affix my signature in presence of two witnesses. 7

WILLIAM G. STEVENSON. Witnesses:

GEO. A. GATES, J OHN F. VAN DEUSEN. 

